Jump-spark apparatus.



PATENTED JUNE 27, 1905. H. U. MUELLER.

JUMP SPARK APPARATUS.

APPLICATION TILED AUG. 27, 1904.

2 SHEETSSHBET 1.

C M A 793J431. PATENTED H. 0. MUELLER.

JUMP SPARK APPARATUS.-

APPLIOATION FILED AUG. 27, 1904.

UNITED STA" HERMAN o. n

Patented June 27, 1905..

PATENT OFFICE.

JUMP-SPARK APPARATUS.

SPECIFICATIQN formingpart of Letters Patent No. 793,143, dated June 27', 1905. Application filed August 27, 1904. fieriel No. 222,388.

Jib all whom it may concern:

Be it known that I, HERMAN C. MUELLER, a citizen of the United States,residing at Fond du Lac, in the county of Fond du Lac and State of Wisconsin, have invented certain new and useful Improvements in Jump-Spark Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming a partthereof.

My invention relates to jump-spark appa ratus for ignition purposes in gas-engines and the like. its main objects are to provide an apparatus for this purpose insuring more certain and eilective operation and which may be more economically constructed than has hitherto been possible with coils of the ordinary construction.

it consists in certain novel features of construction and arrangement of parts hereinafter particularly described, and pointed out in e claims.

l we accompanying drawings like letters he sameparts in the several figures. e l is a vertical longitudinal section 'ention on line 1 1, Fig. 2. Fig. 2 horizontal section of the same on line 2 2, 1. 3 is an end view from the right 1 reference to Figs. 1 and 2. Fig. 4 is a and Fig. 5

cros sect n on line at, Fig. 2;

are. of myinvention, showing the re is L. latipn oi the parts and the electrical ce.;;nec tionn.

A body or casing a serves as a container for pair of separately-mounted parallel induction-coils Z and Z), together with a condenser c of the ordinary type. The/coils and condenser are preferably embedded in and ated by a body of non-conducting material (1?, such as beeswax or paraffin, although other means, such as a sheet of glass or rubmay be used to separate the coils and ser.

Pcferring to Fig. 2, it will be seen that the tion-coils 71 and 6' are provided with sepa-"itc individual cores gand g of the usual which extend somewhat beyond both mary and secondary windings at either and at one end project slightly through the casing. To prevent possible movement of the coils in the casing, it is sometimes deject to jar a heavy iron vibrati,

sirable to connect the other ends of the cores with a yoke of wood or other non-conducting material. (Not shown.) About the cores are the primary windings 7t and h and secondary windings v1 and i, insulated from each other and the cores in an," suitable manner. As shown in the drawings, the primary of one induction-coil is wound to the right and the primary of the other to the left, (although in practice-the winding may be varied,) their terminals at one end being directly connected. hat might be termed a state of mutual induction exists between the two cores when a. current is passing through the coils, the opposite poles of the cores being adjacent. This construction does not produce an actual ele tromagnet; but the cores being parallel i the windingseonnected mutual induction 3:- duces the same effect in a shghter degree.

The secondary coils are separated f c the primary by the'usual insulation and are oi and connected in series, two of their tern1inals being directly connected.

A contact-breaker or vibrator, comprising an armature-plate j, supported by sttable vibrator-springs Z; in, and a'standard Z. carrying a contact-screw m, is secured outside the casing to the end of same in such a manner that the face of the armature-plate fie adia' cent to the ends of the cores 9 and g. he armature-plate 7 is preferably made 1;? one piece of thin soft iron. 1 do not confine myself to a one-piece arn'iature-plate, v' ver, inasmuch as the same may be of lam jited structure or constructed with soft-iron .LT'ZIdS adjacent to the core ends connected by a piece of spring metal or strap-iron. It is practicable to support'the armature upon a single spring secured to the desired. My preferred construction,a thin light-weight spring-mounted armature-plate extending from core to core of two independently-mounted induction-coils, produces a vibrator which is'capable of a very higl of speed, resulting in intense sparks c tremely quick repetition, which lt is cult to attain with sparlccoils of construction. For use with explt in automobiles or where the appr center of the plate, if-

would become unreliable by reason of its inertia and its responding to shock. At every jolt of the vehicle it would jar and get out of rhythm, while with the armature, and the,

short stifi'springs shown in the drawings in connection-with the double coils sparks pass with uniform regularity and immediately and surely when required.

Referring to the diagram Fig. 5, the electrical connections are as follows: The primary terminal ois connected, through binding-post 12, with battery q, thence through bindingpo'st 1' with the armature-spring k. The other primary terminals being directly connected at s, the primary circuit is completed by the connection t to the standard l through the contact-screw m and the armature-plate j. The

' condenser c is connected as a shunt across the interrupter through binding-post 1' and standard Z. The secondary coils are connected in series at u, as described, the other terminals leading to the binding-posts 'u and w, from which wires may be run to the sparking electrodes in the cylinder of an explosive-engine.

By constructing jump-spark apparatus in 'the manner described I am enabled to pro duce a device of considerably less bulk, the two coils taking less space than one coil of the ordinary type, because less wire is used. It. has been found in practice that it is not necessary to use with two coils of this description more than half the amount of wire required for one made in the ordinarym'anner. As wire is one of the costly elements in induction-coil construction, this advantage is of some importance. Various modifications in the details of construction may be made without departing from the principle and intended scope of my invention.

I claim 1. In sparking apparatus the combination with a source of current, of induction-coils having separate cores, and primary and secondary windings and a contact-breaker comprising an adjustable contact-piece and a vibrating armature arranged between ends of the cores and said contact-.piece,-said primary coils being connected with said source of current, contact-piece and armature and with each other in series, substantially as described.

2. In a jump-spark apparatus, a pair of induction-coils having their primary windings connected in series, a separate core for each coil, and a contact-breaker provided with an armature-plate having its face adjacent to the ends of the cores, substantially as described.

vided with an armature-plate supported by a spring at each end and having its face adjacent to the ends of the cores, substantially as described.

5. In an electric circuit, a pair of inductioncoils mounted parallel to each other and having separate cores, a contact breaker provided with a spring-mounted armature having its face adjacent'to ends of the cores, anda condenser shunted across the contact-breaker, substantially as described.

6. ha jump-spark apparatus, the combination with a suitable casing, 6f a pair of parallel induction-coils having separate cores and a condenser in the casing embedded in and separated by a body of non-conducting mate-' rial, and a contact-breaker for the coils provided with a spring-mounted armature having its face adjacent to the ends of the cores, substantially as described.

In witness whereof I hereto aflix my signature in presence of two witnesses.

HERMAN c. MUELLER.

Witnesses:

BERNARD C. ROLOFE, JosnPH F.'KAMINSKY. 

